我正在尝试从 (ARM)ELF 文件开始生成被调用函数的调用图。目前我调用
objdump但是，我注意到一个函数输出了两次：在我的最终反汇编中（我出于调试目的而跟踪）我看到了
[alessandro@commodoroII ~]$ arm-none-eabi-objdump --disassemble=__aeabi_dsub /home/alessandro/tesi/validation_working_area/taffo_benchmarks/bench_cholesky_core2_1_100_100.elf
/home/alessandro/tesi/validation_working_area/taffo_benchmarks/bench_cholesky_core2_1_100_100.elf: file format elf32-littlearm
Disassembly of section .text:
08000688 <__aeabi_dsub>:
8000688: f083 4300 eor.w r3, r3, #2147483648 @ 0x80000000
0800068c <__adddf3>:
800068c: b530 push {r4, r5, lr}
800068e: ea4f 0441 mov.w r4, r1, lsl #1
8000692: ea4f 0543 mov.w r5, r3, lsl #1
8000696: ea94 0f05 teq r4, r5
800069a: bf08 it eq
800069c: ea90 0f02 teqeq r0, r2
80006a0: bf1f itttt ne
80006a2: ea54 0c00 orrsne.w ip, r4, r0
80006a6: ea55 0c02 orrsne.w ip, r5, r2
80006aa: ea7f 5c64 mvnsne.w ip, r4, asr #21
80006ae: ea7f 5c65 mvnsne.w ip, r5, asr #21
80006b2: f000 80e2 beq.w 800087a <__adddf3+0x1ee>
80006b6: ea4f 5454 mov.w r4, r4, lsr #21
80006ba: ebd4 5555 rsbs r5, r4, r5, lsr #21
80006be: bfb8 it lt
80006c0: 426d neglt r5, r5
80006c2: dd0c ble.n 80006de <__adddf3+0x52>
80006c4: 442c add r4, r5
80006c6: ea80 0202 eor.w r2, r0, r2
80006ca: ea81 0303 eor.w r3, r1, r3
80006ce: ea82 0000 eor.w r0, r2, r0
80006d2: ea83 0101 eor.w r1, r3, r1
80006d6: ea80 0202 eor.w r2, r0, r2
80006da: ea81 0303 eor.w r3, r1, r3
80006de: 2d36 cmp r5, #54 @ 0x36
80006e0: bf88 it hi
80006e2: bd30 pophi {r4, r5, pc}
80006e4: f011 4f00 tst.w r1, #2147483648 @ 0x80000000
80006e8: ea4f 3101 mov.w r1, r1, lsl #12
80006ec: f44f 1c80 mov.w ip, #1048576 @ 0x100000
80006f0: ea4c 3111 orr.w r1, ip, r1, lsr #12
80006f4: d002 beq.n 80006fc <__adddf3+0x70>
80006f6: 4240 negs r0, r0
80006f8: eb61 0141 sbc.w r1, r1, r1, lsl #1
80006fc: f013 4f00 tst.w r3, #2147483648 @ 0x80000000
8000700: ea4f 3303 mov.w r3, r3, lsl #12
8000704: ea4c 3313 orr.w r3, ip, r3, lsr #12
8000708: d002 beq.n 8000710 <__adddf3+0x84>
800070a: 4252 negs r2, r2
800070c: eb63 0343 sbc.w r3, r3, r3, lsl #1
8000710: ea94 0f05 teq r4, r5
8000714: f000 80a7 beq.w 8000866 <__adddf3+0x1da>
8000718: f1a4 0401 sub.w r4, r4, #1
800071c: f1d5 0e20 rsbs lr, r5, #32
8000720: db0d blt.n 800073e <__adddf3+0xb2>
8000722: fa02 fc0e lsl.w ip, r2, lr
8000726: fa22 f205 lsr.w r2, r2, r5
800072a: 1880 adds r0, r0, r2
800072c: f141 0100 adc.w r1, r1, #0
8000730: fa03 f20e lsl.w r2, r3, lr
8000734: 1880 adds r0, r0, r2
8000736: fa43 f305 asr.w r3, r3, r5
800073a: 4159 adcs r1, r3
800073c: e00e b.n 800075c <__adddf3+0xd0>
800073e: f1a5 0520 sub.w r5, r5, #32
8000742: f10e 0e20 add.w lr, lr, #32
8000746: 2a01 cmp r2, #1
8000748: fa03 fc0e lsl.w ip, r3, lr
800074c: bf28 it cs
800074e: f04c 0c02 orrcs.w ip, ip, #2
8000752: fa43 f305 asr.w r3, r3, r5
8000756: 18c0 adds r0, r0, r3
8000758: eb51 71e3 adcs.w r1, r1, r3, asr #31
800075c: f001 4500 and.w r5, r1, #2147483648 @ 0x80000000
8000760: d507 bpl.n 8000772 <__adddf3+0xe6>
8000762: f04f 0e00 mov.w lr, #0
8000766: f1dc 0c00 rsbs ip, ip, #0
800076a: eb7e 0000 sbcs.w r0, lr, r0
800076e: eb6e 0101 sbc.w r1, lr, r1
8000772: f5b1 1f80 cmp.w r1, #1048576 @ 0x100000
8000776: d31b bcc.n 80007b0 <__adddf3+0x124>
8000778: f5b1 1f00 cmp.w r1, #2097152 @ 0x200000
800077c: d30c bcc.n 8000798 <__adddf3+0x10c>
800077e: 0849 lsrs r1, r1, #1
8000780: ea5f 0030 movs.w r0, r0, rrx
8000784: ea4f 0c3c mov.w ip, ip, rrx
8000788: f104 0401 add.w r4, r4, #1
800078c: ea4f 5244 mov.w r2, r4, lsl #21
8000790: f512 0f80 cmn.w r2, #4194304 @ 0x400000
8000794: f080 809a bcs.w 80008cc <__adddf3+0x240>
8000798: f1bc 4f00 cmp.w ip, #2147483648 @ 0x80000000
800079c: bf08 it eq
800079e: ea5f 0c50 movseq.w ip, r0, lsr #1
80007a2: f150 0000 adcs.w r0, r0, #0
80007a6: eb41 5104 adc.w r1, r1, r4, lsl #20
80007aa: ea41 0105 orr.w r1, r1, r5
80007ae: bd30 pop {r4, r5, pc}
80007b0: ea5f 0c4c movs.w ip, ip, lsl #1
80007b4: 4140 adcs r0, r0
80007b6: eb41 0101 adc.w r1, r1, r1
80007ba: 3c01 subs r4, #1
80007bc: bf28 it cs
80007be: f5b1 1f80 cmpcs.w r1, #1048576 @ 0x100000
80007c2: d2e9 bcs.n 8000798 <__adddf3+0x10c>
80007c4: f091 0f00 teq r1, #0
80007c8: bf04 itt eq
80007ca: 4601 moveq r1, r0
80007cc: 2000 moveq r0, #0
80007ce: fab1 f381 clz r3, r1
80007d2: bf08 it eq
80007d4: 3320 addeq r3, #32
80007d6: f1a3 030b sub.w r3, r3, #11
80007da: f1b3 0220 subs.w r2, r3, #32
80007de: da0c bge.n 80007fa <__adddf3+0x16e>
80007e0: 320c adds r2, #12
80007e2: dd08 ble.n 80007f6 <__adddf3+0x16a>
80007e4: f102 0c14 add.w ip, r2, #20
80007e8: f1c2 020c rsb r2, r2, #12
80007ec: fa01 f00c lsl.w r0, r1, ip
80007f0: fa21 f102 lsr.w r1, r1, r2
80007f4: e00c b.n 8000810 <__adddf3+0x184>
80007f6: f102 0214 add.w r2, r2, #20
80007fa: bfd8 it le
80007fc: f1c2 0c20 rsble ip, r2, #32
8000800: fa01 f102 lsl.w r1, r1, r2
8000804: fa20 fc0c lsr.w ip, r0, ip
8000808: bfdc itt le
800080a: ea41 010c orrle.w r1, r1, ip
800080e: 4090 lslle r0, r2
8000810: 1ae4 subs r4, r4, r3
8000812: bfa2 ittt ge
8000814: eb01 5104 addge.w r1, r1, r4, lsl #20
8000818: 4329 orrge r1, r5
800081a: bd30 popge {r4, r5, pc}
800081c: ea6f 0404 mvn.w r4, r4
8000820: 3c1f subs r4, #31
8000822: da1c bge.n 800085e <__adddf3+0x1d2>
8000824: 340c adds r4, #12
8000826: dc0e bgt.n 8000846 <__adddf3+0x1ba>
8000828: f104 0414 add.w r4, r4, #20
800082c: f1c4 0220 rsb r2, r4, #32
8000830: fa20 f004 lsr.w r0, r0, r4
8000834: fa01 f302 lsl.w r3, r1, r2
8000838: ea40 0003 orr.w r0, r0, r3
800083c: fa21 f304 lsr.w r3, r1, r4
8000840: ea45 0103 orr.w r1, r5, r3
8000844: bd30 pop {r4, r5, pc}
8000846: f1c4 040c rsb r4, r4, #12
800084a: f1c4 0220 rsb r2, r4, #32
800084e: fa20 f002 lsr.w r0, r0, r2
8000852: fa01 f304 lsl.w r3, r1, r4
8000856: ea40 0003 orr.w r0, r0, r3
800085a: 4629 mov r1, r5
800085c: bd30 pop {r4, r5, pc}
800085e: fa21 f004 lsr.w r0, r1, r4
8000862: 4629 mov r1, r5
8000864: bd30 pop {r4, r5, pc}
8000866: f094 0f00 teq r4, #0
800086a: f483 1380 eor.w r3, r3, #1048576 @ 0x100000
800086e: bf06 itte eq
8000870: f481 1180 eoreq.w r1, r1, #1048576 @ 0x100000
8000874: 3401 addeq r4, #1
8000876: 3d01 subne r5, #1
8000878: e74e b.n 8000718 <__adddf3+0x8c>
800087a: ea7f 5c64 mvns.w ip, r4, asr #21
800087e: bf18 it ne
8000880: ea7f 5c65 mvnsne.w ip, r5, asr #21
8000884: d029 beq.n 80008da <__adddf3+0x24e>
8000886: ea94 0f05 teq r4, r5
800088a: bf08 it eq
800088c: ea90 0f02 teqeq r0, r2
8000890: d005 beq.n 800089e <__adddf3+0x212>
8000892: ea54 0c00 orrs.w ip, r4, r0
8000896: bf04 itt eq
8000898: 4619 moveq r1, r3
800089a: 4610 moveq r0, r2
800089c: bd30 pop {r4, r5, pc}
800089e: ea91 0f03 teq r1, r3
80008a2: bf1e ittt ne
80008a4: 2100 movne r1, #0
80008a6: 2000 movne r0, #0
80008a8: bd30 popne {r4, r5, pc}
80008aa: ea5f 5c54 movs.w ip, r4, lsr #21
80008ae: d105 bne.n 80008bc <__adddf3+0x230>
80008b0: 0040 lsls r0, r0, #1
80008b2: 4149 adcs r1, r1
80008b4: bf28 it cs
80008b6: f041 4100 orrcs.w r1, r1, #2147483648 @ 0x80000000
80008ba: bd30 pop {r4, r5, pc}
80008bc: f514 0480 adds.w r4, r4, #4194304 @ 0x400000
80008c0: bf3c itt cc
80008c2: f501 1180 addcc.w r1, r1, #1048576 @ 0x100000
80008c6: bd30 popcc {r4, r5, pc}
80008c8: f001 4500 and.w r5, r1, #2147483648 @ 0x80000000
80008cc: f045 41fe orr.w r1, r5, #2130706432 @ 0x7f000000
80008d0: f441 0170 orr.w r1, r1, #15728640 @ 0xf00000
80008d4: f04f 0000 mov.w r0, #0
80008d8: bd30 pop {r4, r5, pc}
80008da: ea7f 5c64 mvns.w ip, r4, asr #21
80008de: bf1a itte ne
80008e0: 4619 movne r1, r3
80008e2: 4610 movne r0, r2
80008e4: ea7f 5c65 mvnseq.w ip, r5, asr #21
80008e8: bf1c itt ne
80008ea: 460b movne r3, r1
80008ec: 4602 movne r2, r0
80008ee: ea50 3401 orrs.w r4, r0, r1, lsl #12
80008f2: bf06 itte eq
80008f4: ea52 3503 orrseq.w r5, r2, r3, lsl #12
80008f8: ea91 0f03 teqeq r1, r3
80008fc: f441 2100 orrne.w r1, r1, #524288 @ 0x80000
8000900: bd30 pop {r4, r5, pc}
如您所见，
objdump__aeabi_dsub__adddf3__adddf3objdump谢谢！
编辑：我的意思是我希望
objdump -d
--disassemble
--disassemble=symbol
Display the assembler mnemonics for the machine instructions
from the input file. This option only disassembles those
sections which are expected to contain instructions. If the
optional symbol argument is given, then display the assembler
mnemonics starting at symbol. If symbol is a function name
then disassembly will stop at the end of the function,
otherwise it will stop when the next symbol is encountered.
If there are no matches for symbol then nothing will be
displayed.
不管标签是否对应于实际的函数，为了我正在做的分析的目的，我有兴趣跟踪这些代码片段的调用关系，假设它们表现为函数。
编辑2：用GDB反汇编，我明白了：
[alessandro@commodoroII src]$ arm-none-eabi-gdb -batch -ex 'file /home/alessandro/tesi/validation_working_area/taffo_benchmarks/bench_cholesky_core2_1_100_100.elf' -ex 'disassemble __aeabi_dsub'
Dump of assembler code for function __aeabi_dsub:
0x08000689 <-1>: eor.w r3, r3, #2147483648 @ 0x80000000
0x0800068d <-1>: push {r4, r5, lr}
0x0800068f <+1>: mov.w r4, r1, lsl #1
0x08000693 <+5>: mov.w r5, r3, lsl #1
0x08000697 <+9>: teq r4, r5
0x0800069b <+13>: it eq
0x0800069d <+15>: teqeq r0, r2
0x080006a1 <+19>: itttt ne
0x080006a3 <+21>: orrsne.w r12, r4, r0
0x080006a7 <+25>: orrsne.w r12, r5, r2
0x080006ab <+29>: mvnsne.w r12, r4, asr #21
0x080006af <+33>: mvnsne.w r12, r5, asr #21
0x080006b3 <+37>: beq.w 0x800087a <__aeabi_dadd+493>
0x080006b7 <+41>: mov.w r4, r4, lsr #21
0x080006bb <+45>: rsbs r5, r4, r5, lsr #21
0x080006bf <+49>: it lt
0x080006c1 <+51>: neglt r5, r5
0x080006c3 <+53>: ble.n 0x80006de <__aeabi_dadd+81>
0x080006c5 <+55>: add r4, r5
0x080006c7 <+57>: eor.w r2, r0, r2
0x080006cb <+61>: eor.w r3, r1, r3
0x080006cf <+65>: eor.w r0, r2, r0
0x080006d3 <+69>: eor.w r1, r3, r1
0x080006d7 <+73>: eor.w r2, r0, r2
0x080006db <+77>: eor.w r3, r1, r3
0x080006df <+81>: cmp r5, #54 @ 0x36
0x080006e1 <+83>: it hi
0x080006e3 <+85>: pophi {r4, r5, pc}
0x080006e5 <+87>: tst.w r1, #2147483648 @ 0x80000000
0x080006e9 <+91>: mov.w r1, r1, lsl #12
0x080006ed <+95>: mov.w r12, #1048576 @ 0x100000
0x080006f1 <+99>: orr.w r1, r12, r1, lsr #12
0x080006f5 <+103>: beq.n 0x80006fc <__aeabi_dadd+111>
0x080006f7 <+105>: negs r0, r0
0x080006f9 <+107>: sbc.w r1, r1, r1, lsl #1
0x080006fd <+111>: tst.w r3, #2147483648 @ 0x80000000
0x08000701 <+115>: mov.w r3, r3, lsl #12
0x08000705 <+119>: orr.w r3, r12, r3, lsr #12
0x08000709 <+123>: beq.n 0x8000710 <__aeabi_dadd+131>
0x0800070b <+125>: negs r2, r2
0x0800070d <+127>: sbc.w r3, r3, r3, lsl #1
0x08000711 <+131>: teq r4, r5
0x08000715 <+135>: beq.w 0x8000866 <__aeabi_dadd+473>
0x08000719 <+139>: sub.w r4, r4, #1
0x0800071d <+143>: rsbs lr, r5, #32
0x08000721 <+147>: blt.n 0x800073e <__aeabi_dadd+177>
0x08000723 <+149>: lsl.w r12, r2, lr
0x08000727 <+153>: lsr.w r2, r2, r5
0x0800072b <+157>: adds r0, r0, r2
0x0800072d <+159>: adc.w r1, r1, #0
0x08000731 <+163>: lsl.w r2, r3, lr
0x08000735 <+167>: adds r0, r0, r2
0x08000737 <+169>: asr.w r3, r3, r5
0x0800073b <+173>: adcs r1, r3
0x0800073d <+175>: b.n 0x800075c <__aeabi_dadd+207>
0x0800073f <+177>: sub.w r5, r5, #32
0x08000743 <+181>: add.w lr, lr, #32
0x08000747 <+185>: cmp r2, #1
0x08000749 <+187>: lsl.w r12, r3, lr
0x0800074d <+191>: it cs
0x0800074f <+193>: orrcs.w r12, r12, #2
0x08000753 <+197>: asr.w r3, r3, r5
0x08000757 <+201>: adds r0, r0, r3
0x08000759 <+203>: adcs.w r1, r1, r3, asr #31
0x0800075d <+207>: and.w r5, r1, #2147483648 @ 0x80000000
0x08000761 <+211>: bpl.n 0x8000772 <__aeabi_dadd+229>
0x08000763 <+213>: mov.w lr, #0
0x08000767 <+217>: rsbs r12, r12, #0
0x0800076b <+221>: sbcs.w r0, lr, r0
0x0800076f <+225>: sbc.w r1, lr, r1
0x08000773 <+229>: cmp.w r1, #1048576 @ 0x100000
0x08000777 <+233>: bcc.n 0x80007b0 <__aeabi_dadd+291>
0x08000779 <+235>: cmp.w r1, #2097152 @ 0x200000
0x0800077d <+239>: bcc.n 0x8000798 <__aeabi_dadd+267>
0x0800077f <+241>: lsrs r1, r1, #1
0x08000781 <+243>: movs.w r0, r0, rrx
0x08000785 <+247>: mov.w r12, r12, rrx
0x08000789 <+251>: add.w r4, r4, #1
0x0800078d <+255>: mov.w r2, r4, lsl #21
0x08000791 <+259>: cmn.w r2, #4194304 @ 0x400000
0x08000795 <+263>: bcs.w 0x80008cc <__aeabi_dadd+575>
0x08000799 <+267>: cmp.w r12, #2147483648 @ 0x80000000
0x0800079d <+271>: it eq
0x0800079f <+273>: movseq.w r12, r0, lsr #1
0x080007a3 <+277>: adcs.w r0, r0, #0
0x080007a7 <+281>: adc.w r1, r1, r4, lsl #20
0x080007ab <+285>: orr.w r1, r1, r5
0x080007af <+289>: pop {r4, r5, pc}
0x080007b1 <+291>: movs.w r12, r12, lsl #1
0x080007b5 <+295>: adcs r0, r0
0x080007b7 <+297>: adc.w r1, r1, r1
0x080007bb <+301>: subs r4, #1
0x080007bd <+303>: it cs
0x080007bf <+305>: cmpcs.w r1, #1048576 @ 0x100000
0x080007c3 <+309>: bcs.n 0x8000798 <__aeabi_dadd+267>
0x080007c5 <+311>: teq r1, #0
0x080007c9 <+315>: itt eq
0x080007cb <+317>: moveq r1, r0
0x080007cd <+319>: moveq r0, #0
0x080007cf <+321>: clz r3, r1
0x080007d3 <+325>: it eq
0x080007d5 <+327>: addeq r3, #32
0x080007d7 <+329>: sub.w r3, r3, #11
0x080007db <+333>: subs.w r2, r3, #32
0x080007df <+337>: bge.n 0x80007fa <__aeabi_dadd+365>
0x080007e1 <+339>: adds r2, #12
0x080007e3 <+341>: ble.n 0x80007f6 <__aeabi_dadd+361>
0x080007e5 <+343>: add.w r12, r2, #20
0x080007e9 <+347>: rsb r2, r2, #12
0x080007ed <+351>: lsl.w r0, r1, r12
0x080007f1 <+355>: lsr.w r1, r1, r2
0x080007f5 <+359>: b.n 0x8000810 <__aeabi_dadd+387>
0x080007f7 <+361>: add.w r2, r2, #20
0x080007fb <+365>: it le
0x080007fd <+367>: rsble r12, r2, #32
0x08000801 <+371>: lsl.w r1, r1, r2
0x08000805 <+375>: lsr.w r12, r0, r12
0x08000809 <+379>: itt le
0x0800080b <+381>: orrle.w r1, r1, r12
0x0800080f <+385>: lslle r0, r2
0x08000811 <+387>: subs r4, r4, r3
0x08000813 <+389>: ittt ge
0x08000815 <+391>: addge.w r1, r1, r4, lsl #20
0x08000819 <+395>: orrge r1, r5
0x0800081b <+397>: popge {r4, r5, pc}
0x0800081d <+399>: mvn.w r4, r4
0x08000821 <+403>: subs r4, #31
0x08000823 <+405>: bge.n 0x800085e <__aeabi_dadd+465>
0x08000825 <+407>: adds r4, #12
0x08000827 <+409>: bgt.n 0x8000846 <__aeabi_dadd+441>
0x08000829 <+411>: add.w r4, r4, #20
0x0800082d <+415>: rsb r2, r4, #32
0x08000831 <+419>: lsr.w r0, r0, r4
0x08000835 <+423>: lsl.w r3, r1, r2
0x08000839 <+427>: orr.w r0, r0, r3
0x0800083d <+431>: lsr.w r3, r1, r4
0x08000841 <+435>: orr.w r1, r5, r3
0x08000845 <+439>: pop {r4, r5, pc}
0x08000847 <+441>: rsb r4, r4, #12
0x0800084b <+445>: rsb r2, r4, #32
0x0800084f <+449>: lsr.w r0, r0, r2
0x08000853 <+453>: lsl.w r3, r1, r4
0x08000857 <+457>: orr.w r0, r0, r3
0x0800085b <+461>: mov r1, r5
0x0800085d <+463>: pop {r4, r5, pc}
0x0800085f <+465>: lsr.w r0, r1, r4
0x08000863 <+469>: mov r1, r5
0x08000865 <+471>: pop {r4, r5, pc}
0x08000867 <+473>: teq r4, #0
0x0800086b <+477>: eor.w r3, r3, #1048576 @ 0x100000
0x0800086f <+481>: itte eq
0x08000871 <+483>: eoreq.w r1, r1, #1048576 @ 0x100000
0x08000875 <+487>: addeq r4, #1
0x08000877 <+489>: subne r5, #1
0x08000879 <+491>: b.n 0x8000718 <__aeabi_dadd+139>
0x0800087b <+493>: mvns.w r12, r4, asr #21
0x0800087f <+497>: it ne
0x08000881 <+499>: mvnsne.w r12, r5, asr #21
0x08000885 <+503>: beq.n 0x80008da <__aeabi_dadd+589>
0x08000887 <+505>: teq r4, r5
0x0800088b <+509>: it eq
0x0800088d <+511>: teqeq r0, r2
0x08000891 <+515>: beq.n 0x800089e <__aeabi_dadd+529>
0x08000893 <+517>: orrs.w r12, r4, r0
0x08000897 <+521>: itt eq
0x08000899 <+523>: moveq r1, r3
0x0800089b <+525>: moveq r0, r2
0x0800089d <+527>: pop {r4, r5, pc}
0x0800089f <+529>: teq r1, r3
0x080008a3 <+533>: ittt ne
0x080008a5 <+535>: movne r1, #0
0x080008a7 <+537>: movne r0, #0
0x080008a9 <+539>: popne {r4, r5, pc}
0x080008ab <+541>: movs.w r12, r4, lsr #21
0x080008af <+545>: bne.n 0x80008bc <__aeabi_dadd+559>
0x080008b1 <+547>: lsls r0, r0, #1
0x080008b3 <+549>: adcs r1, r1
0x080008b5 <+551>: it cs
0x080008b7 <+553>: orrcs.w r1, r1, #2147483648 @ 0x80000000
0x080008bb <+557>: pop {r4, r5, pc}
0x080008bd <+559>: adds.w r4, r4, #4194304 @ 0x400000
0x080008c1 <+563>: itt cc
0x080008c3 <+565>: addcc.w r1, r1, #1048576 @ 0x100000
0x080008c7 <+569>: popcc {r4, r5, pc}
0x080008c9 <+571>: and.w r5, r1, #2147483648 @ 0x80000000
0x080008cd <+575>: orr.w r1, r5, #2130706432 @ 0x7f000000
0x080008d1 <+579>: orr.w r1, r1, #15728640 @ 0xf00000
0x080008d5 <+583>: mov.w r0, #0
0x080008d9 <+587>: pop {r4, r5, pc}
0x080008db <+589>: mvns.w r12, r4, asr #21
0x080008df <+593>: itte ne
0x080008e1 <+595>: movne r1, r3
0x080008e3 <+597>: movne r0, r2
0x080008e5 <+599>: mvnseq.w r12, r5, asr #21
0x080008e9 <+603>: itt ne
0x080008eb <+605>: movne r3, r1
0x080008ed <+607>: movne r2, r0
0x080008ef <+609>: orrs.w r4, r0, r1, lsl #12
0x080008f3 <+613>: itte eq
0x080008f5 <+615>: orrseq.w r5, r2, r3, lsl #12
0x080008f9 <+619>: teqeq r1, r3
0x080008fd <+623>: orrne.w r1, r1, #524288 @ 0x80000
0x08000901 <+627>: pop {r4, r5, pc}
End of assembler dump.
其中列出的第一条指令与符号 (?) 的偏移量为负值